Combination-machine for making photoprints on printing-plates by direct contact or projection printing



. H. C. BOEDICKER. COMBINATIONMACHINE FOR MAKING PHOTOPRINTS 0N PRINTING PLATES BY DIRECT CONTACT APPLICAIIUN HLtU H'JLZBTIQII.

Patented Jan.13,1920.

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in U621 60/".- Herm J? C Boedic/Qz by 41 4 H. C. BOEDICKER. COMBINATION MACHINE FOR MAKING PHOTOPRINIS 0N PRINTING PLATES BY DIRECT CONTACT 0R PROJECTION PRINTING.

I APPLICATIUN I'ILEU FEB-23,1917. L327752w Patented Jan. 13, 1920.

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H. c. BOE DICKEH. COMBINATION MACHINE FOR MAKING PHOTOPRINTS 0N PRINTING PLATES BY DIRECT CONTACT Patented Jan. 13; 1920.

4 SHEETS-SHEET 3- 9 ORVPROJECTION PRINTING.

APPLICATION HLtD rm. 23. 1911. l,327,752.

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n Colic/Fer H. c. BOEDICKER. COMBINATION MACHINE FOR MAKING PHOTOPRINTS ON'PRINTING PLATES BY DIRECT CONTACT 0R PROJECTION PRiNTlNG. APPLICATION map us. 23. 1917.

Patented Jan. 13, 1920.

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hrmam @fioede/Ta tion resembles, somewhat, the one described 1n my co-pendin UNITED STATES g rnnr OFFICE.

HERMAN C. BOEIDICKER, OF MINNEAPOLIS, MINNESOTA.

COMBINATION-MACHIN E FOR MAKING PHOTOPRINTS ON PRTNTING-PLATES BY DIRECT CONTACT OR PROJECTION PRINTING.

Specification of Letters Patent.

Application filed February 23, 1917. Serial N 0. 150,613.

rect Contact .or Projection Printing, of

which the following is a specification.

The machine described'in this specificaapplication Serial No. 56,931, filed Octo r 20, 1915, and entitled Art of making'photo prints on printing plates.

However, the machine described in the prior application can be used only for projection printing and I have determined that, while a machine of that class has a great commercial value, yet the field for a machine which will make the photo prints by direct contact printing is much greater, and I have accordingly devised a machine that can readily be used for making photo prints by both methods.

It is to be understood that this machine performs the step and repeat function described in my prior application, sothat multiple prints can be made on the single printing plate from a single printing surcan be made from different negatives on the same printing plate, all of these opera: tions being accomplished in absolute register. v

One object of my' invention is to provide simple and efiicient means for printing, either by direct contact or by projection, from the negative on a printing plate.

Another object of my invention is to provide, certain devices that can be readily re- .vide means for locating on the machine itself, any certain position so that the machine may quickly and positively be returned to this position for a second printinn operation.

W th th a d ncidental objects in View,

. the invention consists of certain novel feaface, such as a negative, and that prints -my co-pending application,

tures of construction and combination of parts, the essential elements of which are Patented J an. 13, 1920.

iereinafter described with reference to the drawingswhich accompany and form a part of this specification.

In the drawings, Figure 1 is a side elevation of -my improved m'achine; Fig. 2 is a plan view of the same; Fig. 3 is an "end view of the machine; Fi 4 is a section taken on the lined-1, F 1g. 3; Fig. 5 is a fragmentary 'plan view of the hood connection with negative holder and lamp house, Fig. 11; Fig. 6 is an enlarged detail of the supporting rollers shown as a section taken on the line 6-6, F ig; 1; Fig. 7 is an enlarged detail of the locating means shown in Fig. 1; Fig. 8 is a front view of the negative holder; Fig. 9 is a section taken on the line 99, Fig. 8; Fig; 10 is a detail of the angular adjustment means embodied in the negative holder; Fig. 11 is a side elevatio' of the lamp, lens, and

condenser used on the machine for project on printing; Flg. 12 1s a similaivlew of the machine with the lens and condenser re.-

moved and the .lamp positioned for direct' contact printing, and 'Fig. 13 is a sectiontaken on the line 13'--13, Fig. 11.

The means used for positioning the lamp, condenser, lens, etc., is similar to that disclosed in my copending application heretofore mentioned, "ld will be summarized herein only brief? A pair of true. 1 Fig. 1 support on the vibration absorbing means 2, a base? which carries a magnetic board-4 for holding print plates similar to the one described in Serial No. 114,874, filed August 14, 1916, and entitled Printing plate holding device.

The base 3 also supports on tracks 4, by rollers 5, better shown in Fig. 6, a frame (3 built of structural shapes and carrying Fig 5. condenser holder 40, Figs. 5

shaft 17, Fig. 2, which, by beveled gears 18, shaft 19, worm and worm gears 20, and shaft 21 rotates pinions along the vertical racks; 23, better shown in Fig. 3.

Togive longitudinal adjustment of the 'frame 6, the hand wheel id-l, Fig. l, actnates the gears.25 which travel along the hori- V zontal rack 26, Figs. 1 and 2.

For transverse adjustment of. the plate 12 on the table 7, the hand wheel 27, Fig. 1.

turns the screw 28 directly, and through beveled ears 29 shaft 30. lieveled ears 31-.

adjusted, as plainly shown in Figs 11 and 13, longitudinally on the plate 12.

In Figs. 1 and 2 I have shown a lamp,

lamp house, condenser, lens and bellows of the same general style as that shown and described in my first application aforesaid,

in order to show the advantages of -my present construction.

While I may use on the machine herein described,.these parts, as shown in Figs. 1 and 2, I prefer'to use a different construe tion of lamp and lamp house as shown in 5, 1'1 and 12. he lamp '37, Fig. 11 is entirely inclosed except for the projection aperture at 38 and carries at 38 a pair of in-turned angles 39,

and 11, also carries a pair of oppositely disposed in-turned angles 41, and a hood 12 is provided with flanges 43 at one end and 44 at the other end to slide into the grooves formed-by these in-turned angles.

. Suitable inlet 45 and outlet 46 for air, are provided in any suitable manner'so that the hood may be self-ventilating, to carry away heat from the lamp without losing any light through the ventilator; as thenlamp. must be focused with the condenser in ac cordance with the focusing of the lens, the

hood 42 is formed in two parts, telescoping together at 42, Fig. 12.

A similar slidingjoint connection is pro+ vided between the negative holder and the bellows 4 With the apparatus disposed. as shown in Fig, 11 if it is desired to make prints by contact printing, it is only necessary to'slide the T bolt, carried by the lens holder, forwardly out of its slot, lift the slid-able end of the bellows from its co-acting joint in the front side of the negative holder, slide the negative holder out of the slot, lift the hood 42 upwardly out of its slot joints, and remove the condenser 40, then replace the ne alivc holder $7 in a reversed position, s11 e the hood 42 in engagement with its co-actmg sliding joint carried by the lamp at 39, an

with its co-acting sliding joint carried by what is now the rear side of the negative holder, and which formerly received the large end of the bellows.

The apparatus is then ready for direct. contact printing and, as shown in'Fig, 12,

the negative 49 can he brought up into di'- rect contact with the plate supported on the magnetic board 4:

The negative holder 47. shown in detail in Figs. 8 and 9, .has'adjustment means 50,. i

better shown in Fig. 10, for angularly positioning the negative.

he negative comprises a beveled glass or other transparent material 51,- on which is carried an actual photographic film from which the print is made.

It is to be noted that thelower edge of the beveled glass rests in a slot 52 carried by the negative holder, while the top of the beveled glass is maintained in its proper position by spring clips 53 so that the face- 5% of the negative is carried in front of all mechanism of the negative holder, and can thus be brought directly into contact with the printing plate.

. In this art it is quite essential for rapid work to-be-able to make a positive location of the positions of the various adjustable arts of the machine so that any position m which the machine has been operated on the plate can be duplicated at will so as to secure points in register. 4

It is also advantageous to be able to make a print'on a large sized printing plate, to measure off directly on the machine a number of spaces, vertically and horizontally, adefinite distance from the first exposure, and to be able to set the machine quickly at these variofls locations so that a number of exposures may be made on the plate at absolutely definite locations 'on the plate. I To accomplish both of these results, I provide a set of clips 55, Fig. 4, which may be clamped onto the channel members or angle members of the frame at any desired location by the screws 56.

The co-acting frame members carry .a spring controlled indicating finger 57 It is apparent that if the machine is ads.

justed in one position-and the clip 55 placed on the frame as shown in Fig. 7, in line with the indicating finger, that this particular adjustment can be repeated with great accuracy whenever desired;-also if. it is desired to not only repeat; this particular position, but also to movequickly to a. position-at a definite distance above the one located, for instance, it is only necessary to place a second ch 55 along the channel all adjustments of the machine.

curately with a pair of dividers orruler from the first clip and that the machine can be quickly adjusted from one to the other of the positions. It is of great importance in operating a machine of this class that the plate 12, Figs. 1 and .3,'be moved in a rectilinear manner in Thus the machine provides for three directions of adjustment and these directions must correspond to the planes bounding a cube or rectangular block whose angles are of ninety degrees.

For this reason it is of utmost importance that the ways in which the plate 12 slides transversely'are horizontal at all times, that thevertical racks 23' are truly vertical and that the longitudinal rack 26 is absolutely horizontal and parallel to the longitudinal frame members of the machine base.

It is a simple matter to build the track 26 to meet its requirements, but the vertical members of the frame are sub ect to more or' ,l9SS distortion, and'for this reason I have prpvided adjustment rods.

' '{itlour'rods 58, Figs. land 3, are provided each having an eye 59, Fig. l, at one end and terminating in threaded end 60 at the other extremity which passes through an aperture carried by the extension 61 of the frame.

By means of a pair of nuts 62 and 62, one.

positioned on either side of the plate, these rods may be adjusted so'as to draw the frame into a truly vertical position as viewed in Fig. 3.

Similarly our adjusting rods 64, Fig. 1, are provided to aline the frame verticallyas viewed in Fig. 1.

The upper ends of these rods are preferi ably bent and fastened to the frame of the machine at 65 in any suitable manner, and the other ends are threaded at 66, and a pair of nuts 67 and 68, positioned on either side of theplate of the frame through which the rod passes, provides for this adjustment.

Similarly the spacing rods 69 and 7 0 are each provided with a pair of nuts pqitioned on either side of the rear engagement point with the frame at 71 and 72 respectively.

' While 1 have described my invention and illustrated it in several designs, I do not wish it understood that If limit myself 'to these constructions, as the application ofniy invention may be varied in many ways with the scope of the following claims.

.Glaim's': p 1. in a combination machine for making photo prints on printing plates, the combination of a base, vibration absorbing means supporting said base, a plate supported on said base and having means of adjustment longitudinally, vertically, and transversely thereof, a lamp, a hood, a condenser, a negative holder, a hellowe and a lens slidably mounted in said plate, said negative holder having means of engagement on one side thereof with said bellows, or said hood.

2. ln-a negative holder for machines formaking photo prints on printing plates, the combinationof a frzuue for receiving therein a transpmrcnt plate having a beveled edge, and means for clamping said transparent plate to said frame so the front surface of said plate is forward of all means of engagement with said frame.

3. In a negative holder for machines for making photo prints on printing plates, the combination of a framerotatably mounted, a transparent plate, and means of engaging said transparent plate with said frame intermediate of the faces of said plate.

4. The combination, in a negative holder, of a rotatably mounted negative frame, a glass plate having two edges thereof beveled and a notch in the lower side of said frame for receiving one of said beveled edges, with the forward surface of said plate extending forwardly of said frame, and spring clips for engaging the other beveled edge of said plate.

5. In a combination machine for making photo prints on printing plates by direct contact or projecting printing, the combination of a base, vibration absorbing means supporting said base, a table carried on said base and adjustable therewith vertically, longitudinally, and transversely, a board for holding printing plates mounted on said base,-a lamp, a condenser, a negative holder and a lens slidably mounted on said table, a hood slidably mounted between said lamp and said condenser and adapted to he slidably mounted between said lamp and said negative holder, and a telescoping extension carried in said hood for focusing said lamp on said condenser.

6. In an adjustable table for making photo rints on printing plates, the combination of a lamp, a condenser, a negative holder and a lens all slidably mounted in said table, a hood slidably engageable with said lamp and said condenser and having an extensible portion therein to allow the focusing of said lamp on said condenser, a bellows slidably mounted on said negative holder, said slidable means on said negative holder being also adapted to engage with the slidable means whereby said hood engages with said condenser, a beveled plate glass carried by said negative holder on the opposite side from said slid-able engagement means to receive thereon a transferred negative fi1m..

1 7. In an adjustable table for making photo prints on printing plates, the combination of a lamp, a condenser, a negative holder,

and a lens, all slidably mounted in said from the negative held in said negative holder.

8. In an adjustable table for making photo prints on prinsing plates, the combination of a lamp, a condenser, a negative holder, end a lens, all slidably mounted in said table, e hood slidably engegeeble with said lamp and said condenser and having an extensible portion therein to nliow the focus ing of said lamp on said condenser, and

bellows slidebly mounted on said negative holder said shdeble means on said ne dlllifi' g 15 holder oeing also adapted to engage wleh 1 s I neeewee the slid-able means whereby said hood engages with said condenser.

9. In a combination machine for making phoio prints on printing plates by projec- "tion or direct Contact, the combination of an adjustable table, a, lamp, a COHClGIISP/P, a negative holder, and a lens, all edjustzibly and detachably mounted on said table, a printing plate holder, and means foredjus'b ing the devices carried by said table for projection printing or for direct Contact printing on a printing plate held by said printing plate holder.

HERMAN C. BOEDICKER. 

